天然渠
天然渠-
本文从天然河道成为渠化河道后水力条件的改变，提出了渠化河道水质预溯的计算方法，并推导出包括边界反射及其横向扩散在内的数学模型。
A calculation method has been developed for predicting water quality in a canalized river due to the change of hydraulic conditions after the canalization of the river , and a mathematic model has also been established including the consideration of the boundary reflection and the transverse dissipation .
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天然河道、灌溉渠系中的水流均属于紊流，它是一种相当复杂的流动现象。
The water flow of Natural River and irrigation canal system is turbulence which is a complicated flow phenomenon .